{"operation":"document","citation":"P-77-025","title":"NTSB Safety Recommendation P-77-025","source_type":"guidance","agency":"National Transportation Safety Board","status":"guidance","official":true,"published_on":"1977-09-27","effective_on":"1977-09-27","summary":"INSTRUCT ITS CREWS TO ASCERTAIN POSITIVELY BY ALL POSSIBLE MEANS THE TYPE AND SIZE OF EXISTING GAS LINE FACILITIES BEFORE WORKING ON THEM.","machine_formats":{"json":"https://regulus.evalyn.ai/document/ntsb-recommendation-p-77-025.json","markdown":"https://regulus.evalyn.ai/document/ntsb-recommendation-p-77-025.md"},"app_url":"https://regulus.evalyn.ai/document/ntsb-recommendation-p-77-025","source_url":"https://data.ntsb.gov/carol-main-public/sr-details/P-77-025","body":"NTSB safety recommendation P-77-025.\n\nINSTRUCT ITS CREWS TO ASCERTAIN POSITIVELY BY ALL POSSIBLE MEANS THE TYPE AND SIZE OF EXISTING GAS LINE FACILITIES BEFORE WORKING ON THEM.\n\nPriority: CLASS II\n\nOverall Status: Closed - Acceptable Action\n\nIssued Date: 1977-09-27\n\nAdopted Date: 1977-09-16\n\nOverall Date Closed: 1978-11-21\n\nSynopsis: ON MAY 25, 1977, AN EXPLOSION AND FIRE DESTROYED A BUILDING AT 65-67 ARCH STREET IN GREENWICH, CONNECTICUT. TWO ADJACENT BUILDINGS WERE ALSO DESTROYED AND ANOTHER BUILDING WAS HEAVILY DAMAGED. FIREMEN EVACUATED RESIDENTS FROM A TWO-BLOCK AREA 30 MINUTES AFTER THE EXPLOSION. TEN PERSONS REQUIRED MEDICAL TREATMENT FOR INJURIES CAUSED BY THE ACCIDENT.\n\nNtsbnumber: DCA77FP024\n\nReport Number: None\n\nAddressee Name: Connecticut Natural Gas Corporation\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1978-11-21\n\nAddressee Acronym: CNG\n\nAddressee Organization Type: S-State Government\n\nCommunication Date: 1977-10-13\n\nCommunication Type: Official Correspondence\n\nCommunication Contents: CONNECTICUT NATURAL GAS CORP. LTR: THE CNG CORP. SUSPENDED ALL HOT LINE INSULATION FITTING INSTALLATIONS UNTIL EVENTS SURROUNDING THE ACCIDENT COULD BE EVALUATED. CNG CORP. HAS IMPLEMENTED REVISED WRITTEN PROCEDURES TO REQUIRE A COMPLETE REVIEW OF EXISTING RECORDS PRIOR TO COMMENCING WORK. IT ALSO REQUIRES A TEST TAP TO DETERMINE THAT A PIPE IS A GAS CARRIER AND NOT A SLEEVE BEFORE ACTUAL HOT TAP IS PERFORMED. 2/1/78 - CNG LTR TRANSMITTING MATERIAL REQUESTED BY NTSB IN LETTER OF 1/24/77: CNG GUIDELINES FOR INSTALLATION OF HOT TAP INSULATOR FITTINGS, AND PROCEDURE TO INSTALL HOT TAP INSULATOR FITTINGS.\n\nAddressee Acronym: CNG\n\nAddressee Organization Type: S-State Government\n\nCommunication Date: 1978-01-24\n\nCommunication Type: Official Correspondence","truncated":false,"body_characters":1801}